Method of and means for making roofing material.



No. 876,010. PATENTED JAN. 7, 1908.

F. 0. OVERBURY. METHOD OF AND MEANS FOR MAKING ROOFING MATERIAL.

APPLICATION FILED MAR. 25. 1907.

UNITED STATES PATENT OFFICE.

FREDERICK C. OVERBURY, OF NEW YORK, N.Y., ASSIGNOR TO FLINTKOTE MANUFACTURING COMPANY, OF RUTHERFORD, NEW JERSEY, A CORPORATION OF NEW JERSEY.

METHOD or Ann MEANS Eon MAKING noorme MATERIAL.

I Specification of Letters Patent.

Patented Jan. 7, 1908.

Application filed March 25. 1907. Serial No.- 364,480.

To all whom it may concern:

BURY, of New York, in the county of New York and State of New York, have invented certain ,new and useful Improvements in Methods of and Means for Making Roofing Material, of which the following is a specification.

This invention relates to the manufacture of roofing. material composed of a flexible strip adapted to be fastened to a roof or other surface, the strip being coated on one side with a powdered or granular mineral, which is caused to adhere to the material which is coated first with a hot adhesive material before the ap lication of the granular coating material. t is customary in making roofing strips of this character, to longitudinally subdivide a web of the flexible material into a plurality of strips, the web being cut or penetrated by a slitting device, which acts on the ortion of the'web to which the coating has been applied. The ordinary means employed comprise a tank containing a liquid composition, through which the web is passed; the liquid permeatingthe material of the web, and giving it a suitable waterproof quality, a hopper or reservoir for the ranular coating material arranged to sprinle the same upon the web after it leaves thetank, and a severing or slitting device arranged to make a longitudinal line of division 'in the coated portion of the web, suitable rolls being employed for storing and per mitting the unwinding of the untreated web, for winding up the strips formed by severing the web, and for guiding the material in its course from one end of the machine to the other. Heretofore the coatin of ranular material has been applied to t e we across its entire surfaoe,'includingl the part upon which the slitting device acts. Much difficulty has been experienced owing to the rapid wear of the slitting or cutting edge or edges by contact with the granular material, this being of a gritty nature so that it rapidly dulls a cutting edge.

My invention has for it's'objeet to obviate this difficulty, and to this end it consists in an improved method of and means for making improved strips, the said method and means involving the longitudinal interruption of the coating to form a narrowlongir tudinal uncoated portion between the edges of the web, the said portion being the part of the web on which the slittin device acts, so that the slitting or cutting e ge is not (lulled or impaired by contact with the granular coatin material.

Of the accompanying drawings, forming a part of this specification,-Figure 1 represents a side elevation showing, in a somewhat conventional form, an apparatus suitable for use in carrying out myinvention. Fig. 2 represents a top plan view of the same. Fig. 3 represents a perspective view of a portion of the apparatus and a portion of a web undergoing treatment.

The same letters of reference indicate the same arts in all the figures.

In t e drawings, a re resents a web of flexible material suitable flir covering roofs and other surfaces of buildings, the web beingaccumulated in the form of a roll on an unwinding mandrel or drum 1), and conducted therefrom by suitable guide rolls through a tank 0 containing a'liquidpreparation of any suitable nature,'the preparation being adapted to im art a waterproof. qualit to the mate rial o the web, and to cause the adhesion of the granular coating material thereto The web after leaving the tank c, asses between suitable pressure rolls (1 d an e e, then over cooling drums f g to a winding arbor or reel-h,

a slitting device, represented conventionally at i, being employed to slit or sever the web longitudinally prior to its accumulation upon the winding reel.

'5' represents a hopper or reservoir located above a portion of t e web, and extending crosswise of the same, the reservoir being preferably located between the pressure rolls 6 and the cooling rolls f g. The reservoir is ada ted to distribute upon the upper surface of t e web, a granular coating material, the lfatter adhering to the previously treated surace. In carrying out my invention I provide means for interrupting the crosswise continuity of the coating to give the web a bare or uncoated portion 2 extending lengthwise of the web, the coating being thus divided into two longitudinal portions3 3, The uncoated portion '2 registers with the slitting device *5 so that the cutting edge encounters only the uncoated portion 2, and is not subjected to contact with the granular coating material; hence a longitudinal slit or cut I: is formed by the slitting device at the longitudinal center of the uncoated portion 2, as indicated in Fig. 2, the web being thus divided into a plurality of roofing strips, which are wound together on the winding reel h, and are separable from each other. The means here shown for depositing the coating mate rial in the manner descrlbed to form the un- It will be seen from the foregoing that provision is made for cutting or slitting the strip without injury to the slitting device by contact with the granular coating material; hence the durability of the slitting device is greatly prolonged by my invention. Suitable guides should be provided to prevent edgewise displacement of the strip, and to preserve the desired relation between the uncoated portion 2 and the slitting device.

My invention is not limited to the described means for interrupting the transverse continuity of the coating, it being obvious that various other means may be employed for this purpose, such, for example, as aroller supported by the hopper j, and bearing upon the web at such point as to divide the stream of coating material falling from the hopper, into two parts, leaving the part 2 uncoated. A narrow strip of aper or other flexible material of the widt of the uncoated portion 2, may be mounted upon a reel at one side of the hopper, and deposited upon the web in' such manner as to cover the portion 2 at the point where the web passes under the ho er, thus preventing the coating material om touching the portion 2. A suitable scra er may be employed to remove the coating'from the portion 2,' thus interrupting the transverse continuity of the coating by a denuding operation.

The apparatus here illustrated is shown simply for purposes of illustration, and it is to be understood that my invention is not limited to the organization of means here shown for treating the web in themanner described.

It is obvious that a plurality of uncoated ortions 2 may be formed on the web, in case 1t is desired to subdivide the Web intomore than two strips.

I claim:

1. A roofing stri machine, com rising means for successive y applying an adhesive and a longitudinally interrupted granular coating to a web of roofing material, a narrow longitudinal portion of the web being left uncoated, and web slitting means arranged to act on the said uncoated ortion.

2. A roofing stri mac 'ne comprising vmeans for successive y applying an adhesive and a plurality of independent longitudinal granular coatings to a web of roofing material, said coatings being separated by a narrow uncoated portion of the web, and means for slitting the web. along thesaid uncoated portion.

3. That im rovement in the method of making coate roofing strips, which consists in successively applying an adhesive and a longitudinally interrupted granular coating to a web of flexible roofing material, to form a narrow longitudinal uncoated portion, and slitting the web along said uncoated portion.

4. That im rovement in the method of making coate roofing strips which consists in successively applying an adhesive and a plurality of longitudinal granular coatings to a web of roofing material, said coatings being separated by a narrow longitudinal uncoated portion of the web, and then slitting the web along said uncoated portion.

In testimony whereof I have affixed my signature, in presence of .two witnesses.

FREDERICK C. OVERBURY.

Witnesses:

CHAS. E. ToLHURs'r, C. P. PERHAM. 

